Rock crusher



`une 1 1926.

c. B. ROGERS ROCK cRsHER Filed sept. 12, 1924 Patented June 1, 19255.

UITE.

.para

- resinas ROCK CRUSHE B1.

Application filed September 12, 1924. Serial No. 737,377.

This invention relates to rock Crushers, and more particularly to improvements in jaw plates.

In the jaw type ot crusher, the work is performed on the lower portion of the jaws and it is the usual practice to reverse the jaws end `t'or end when the lower portions become worn and continue the use et the jaw until the other end portion is worn as thin as possible. The interniediate portion et the jaw receives practically no wear and when the jaws are scrapped., a great deal oi. the weight of the original jaw must be disposed of scrap metal at a considerable loss.

In the present invention I provide jaws or jaw plates which have concaved rear faces, providing thickened portions adjacent each end and a thin central or intermediate portion. This will reduce the weight of the jaws from to 30 per cent, and this reduction is effected on a part of the jaw in which no wear occurs.

In the accompanying drawings, I have shown one embodiment of the invention. In this showing:

Figure 1 is a central vertical longitudinal sectional view of a rock crusher showing the invention applied,

Figure 2 is a. transverse sectional view of the movable jaw substantially on line 2 2 ot Figure 1,

Figure 3 is a perspective view of a false plate arranged behind the hollowed out portion of the jaw plate, and

Figure Ll is a perspective view ot' the jaw plate.

Referring to the drawings, the reference numeral 1 designates a suitable support consisting oit` transverse beams arranged at each end oit the machine and adapted to support longitudinal beams 2 on which the machine rests. A stationary, rectangular frame of cast metal encloses the sides and ends ot the crusher mechanism and the portion designated by numeral 3 is adapted to receive and support the stationary jaw designated as a whole by numeral Ll. As shown, the stationary i aw plate ci wear resisting metal is provided with a front face 5 which is substantially flat, and is provided with a rear face 6 that is concave producing a thin central portion. A false plate 7, having a convex face is arranged in the rear of the jaw plate. The false pla-te is secured to the iran'ie by means of bolts 8 and is further provided with a rib 9, on the rear side, adapted to enter a groove or recess inthe frame 3. The jaw plate is retained in position by means ot a lip 10, "formed ot the false plate and by side members 11 which are arranged on. opposite sides ot the machine.

A movable jaw support or bumper is mounted opposite in relation to the stationary aw and consists ol' a bumper 12 mounted on a shatt 11i and swings thereon by means of `an adjustable bearing. The bumper is provided ywith a jaw plate 16 formed of suitable wear resisting material, Y

the vdetail construction ot which is shown in Figure l of the drawings. As shown, it is provided with a rear concaved t'ace 17 and a false plate 18 (see Figure having a conveX face, is arranged between the bumper and the plate 16. The jaw plate is retained in position in any suitable manner as by means of a jaw bolt 19, which is carried by the jaw bumper and which passes through a beveled recess or depression 2O in the upper end of the jaw plate. Thelower end or the jaw plate is retained in position 8 by means ol a toe 21, secured to the jaw bumper by mea-ns ol' bolts 22. A lug 23 is cast on the rear side ot' the false plate 18 and this lug is adapted to be received in a recess in the jaw bumper (see Figure 42). Stud bolts 24 may also be employed to retain the false plate in position.

The jaw bumper 12 is adapted to be actuated in the usual manner to move it toward and away from the stationary jaw 1. As shown, an eccentric shalt 25 is arranged rearwardly of the aw rbumper 12 and is provided with a pitman 26. Toggle joints 27 arey arranged on opposite sides ot' the `pitman. As shown, these toggle joints are provided with rounded ends 28 which are received in bearing members 29. carried by the pitm'an and having similarly rounded recessed faces. A block 30 is supported on the trame of the machine and is adapted to re* ceive the other rounded end of the rear toggle. A plate 31 is mounted on the rear of the bumper 12 and is'provided with a rounded recess to receive the end of the other toggle. A rod 32 is secured to the rear of the bumper and passes through an opening in the rear transverse beam 1. A spring 33 is arranged on this rod between a pair of collars 34;; The rod is threaded and a lieudle 35 is provided 4for adjusting the rension of lie spring'. j

ln operation, the rotating movexiieiit of lie eccentric elieit raises and lowers the piiroen 2G imparting a reeiproeeing verl1icel motion to the inner euds of the toggles 27. This oseilleres the bumper and movable jew beek and -forth toward the stationjar; As usuel in the nv. ype cruslier, the lower end o1 the Vmovable jew is always nearer the stationary jew forming a V- el'iz'sped crushing chamber and lie weer oecors on the loiver portion of the jaw plates. it will be apparent that' when each end porrioriof tbe jaw plate has been Worn as thin possible, :ind J@he jaw plaie discarded7 the lose 1will be meier-lolly reduced due to lie fact that :i greater percentage er' lie Weight ol lie materiel inthe jews is put to die useful vforl: of crushing.

Tr Will ybe understood that the form of my invention liereivili shown and described .is to be teken as e preferred exemple of the seme, and diet various changes in the shape,

size, and arrangement of parte may be resorted ro Without departing from the spirit of the invention or the scope of the sul3- joined claims.

l. In a LW-type Crusher, a stationary avv, a movable jew, aw plates mounced on said jews, seid jevv plates being provided with fiat from; faces and eonoaved rear faces forming an 'dro or' a oirele whereby the end porions of die jew plaies are of subszmtial thickness sind the central portions ere reletively thin, and means for actuating said movable jaw. Y

2. In a jaw-type Crusher, a steffionaruv jew, e movable jaw, jew plates mounted on .Said jews, false plates mounted on seid jews et the rear of seid jaw plates, said false plates being provided with convex; feces loriiiing an are or a circle, said jaw plates being' provided with Het 'front faces and concfrved rear feces edeped to receive ille convex portion of seid false plates, and means for aouatirig seid movable In testimony whereof, l eiix my signaure.

CHARLES B. ROGERS. 

